Built since 1984, the Toyota 4Runner has seen many layers of evolution in its capability and equipment, but has stayed true to its basic premise: affordable, capable, rugged transportation. One of the last body-on-frame midsize SUVs available, the 4Runner is a favorite of off-road enthusiasts. A range of V-6 and V-8 engines in most recent models provides plenty of power, but efficiency fans might want to look for four-cylinder versions, which were discontinued after 2010.